Friday

February 27, 2015

February 27, 2015

Posted by **American Public University** on Saturday, May 4, 2013 at 4:47pm.

- statistics -
**MathGuru**, Sunday, May 5, 2013 at 6:26pmFormula to find sample size:

n = [(z-value)^2 * p * q]/E^2

... where n = sample size, z-value is found using a z-table for 95% confidence (which is 1.96), p = .0875, q = 1 - p, ^2 means squared, * means to multiply, and E = .02.

Plug values into the formula and calculate n. Round the answer to the next highest whole number.

- statistics -
**Robert**, Sunday, January 4, 2015 at 11:33pmAfter calculating the sample size needed to estimate a population proportion to within 0.05, you have been told that the maximum allowable error (E) must be reduced to just 0.025. If the original calculation led to a sample size of 1000, the sample size will now have to be .

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